Healing ICC5 as a Paladin (or, Why not to make your tank and healer angry)

Now that I have some gear on my Paladin’s Holy set, the ICC5 dungeons come up a lot. First off, I am a relatively new Paladin healer. I am still getting the hang of things. Next, and more importantly, those instances deal a lot of damage to the party as a whole. It’s hard enough to heal without DPS standing in poison or casting spells at a spell reflecting mob. This was last night’s conversation:

DPS: “MAN THIS PALADIN SUCKS.”
Me: “I am a single target healer. Please try to avoid standing in void zones and casting at a reflecting mob, etc.”
Tank: “He is an OT/MT healer, not an AoE healer. Don’t be an idiot.”
DPS: “I HAVE A PRIEST ALT AND THIS PLACE IS EASY.”
Me: “You have AoE heals. I don’t have any.”
DPS: “THIS IS LULZ. YOU SUCK.”
Me: “kay.”
Tank: “Just keep me alive.” (Races ahead to next mob while the DPS is QQing. PEW PEW PEW, mob dead.) “See, we don’t need them. Let’s roll on the trinket.”
Me: “Sounds good.”
DPS: “HEY WTF.”